public override nfloat GetRowHeight(NSTableView tableView, nint row)
{
var height = tableView.RowHeight;
for (int i = 0; i < tableView.ColumnCount; i++) {
var cell = tableView.GetCell (i, row);
if (cell != null)
height = (nfloat) Math.Max (height, cell.CellSize.Height);
}
return height;
}